Implement P0298R3: 'std::byte'. Reviewed as https://reviews.llvm.org/D31022 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@298689 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/cstddef b/include/cstddef index 103898b..6258449 100644 --- a/include/cstddef +++ b/include/cstddef
@@ -28,6 +28,7 @@ size_t max_align_t nullptr_t + byte // C++17 } // std @@ -58,4 +59,32 @@ _LIBCPP_END_NAMESPACE_STD +#if _LIBCPP_STD_VER > 14 +namespace std // purposefully not versioned +{ +enum class byte : unsigned char {}; + +constexpr byte& operator|=(byte& __lhs, byte __rhs) noexcept +{ return __lhs = byte(static_cast<unsigned char>(__lhs) | static_cast<unsigned char>(__rhs)); } +constexpr byte operator| (byte __lhs, byte __rhs) noexcept +{ return byte(static_cast<unsigned char>(__lhs) | static_cast<unsigned char>(__rhs)); } + +constexpr byte& operator&=(byte& __lhs, byte __rhs) noexcept +{ return __lhs = byte(static_cast<unsigned char>(__lhs) & static_cast<unsigned char>(__rhs)); } +constexpr byte operator& (byte __lhs, byte __rhs) noexcept +{ return byte(static_cast<unsigned char>(__lhs) & static_cast<unsigned char>(__rhs)); } + +constexpr byte& operator^=(byte& __lhs, byte __rhs) noexcept +{ return __lhs = byte(static_cast<unsigned char>(__lhs) ^ static_cast<unsigned char>(__rhs)); } +constexpr byte operator^ (byte __lhs, byte __rhs) noexcept +{ return byte(static_cast<unsigned char>(__lhs) ^ static_cast<unsigned char>(__rhs)); } + +constexpr byte operator~ (byte __b) noexcept +{ return byte(~static_cast<unsigned char>(__b)); } + +} + +#include <type_traits> // rest of byte +#endif + #endif // _LIBCPP_CSTDDEF 